process_policy_test.cc: Fix mixed-sign comparison warning.

sandbox/win/src/process_policy_test.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <memory>
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 398 matching lines @@
             runner.RunTest(L"Process_RunApp4 findstr.exe"));
   EXPECT_EQ(SBOX_TEST_SUCCEEDED,
             runner.RunTest(L"Process_RunApp5 findstr.exe"));
   EXPECT_EQ(SBOX_TEST_SUCCEEDED,
             runner.RunTest(L"Process_RunApp6 findstr.exe"));
 }
 
 // Tests that the broker correctly handles a process crashing within the job.
 TEST(ProcessPolicyTest, CreateProcessCrashy) {
   TestRunner runner;
-  EXPECT_EQ(STATUS_BREAKPOINT, runner.RunTest(L"Process_Crash"));
+  EXPECT_EQ(static_cast<int>(STATUS_BREAKPOINT),
+            runner.RunTest(L"Process_Crash"));
 }
 
 TEST(ProcessPolicyTest, OpenToken) {
   TestRunner runner;
   EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(L"Process_OpenToken"));
 }
 
 TEST(ProcessPolicyTest, TestGetProcessTokenMinAccess) {
   TestRunner runner;
   base::string16 exe_path = MakePathToSys(L"findstr.exe", false);
@@ skipping 82 matching lines @@
   HANDLE thread = NULL;
   thread = TargetCreateThread(
       ::CreateThread, NULL, 0, &TestThreadFunc,
       reinterpret_cast<LPVOID>(static_cast<uintptr_t>(pid)), 0, &thread_id);
   EXPECT_NE(static_cast<HANDLE>(NULL), thread);
   EXPECT_EQ(WAIT_OBJECT_0, WaitForSingleObject(thread, INFINITE));
   EXPECT_EQ(WAIT_OBJECT_0, WaitForSingleObject(event, INFINITE));
 }
 
 }  // namespace sandbox